A team of CBI officers probing the alleged rape and murder of a 19-year-old Dalit girl in Hathras, Uttar Pradesh, arrived at the Gandhinagar-based Forensic Science Laboratory (FSL) with the four accused. A brain electrical oscillation signature profiling (BEOSP) test will be conducted on all four.
Brain Electrical Oscillation Signature Profiling (BEOSP) is also known as brain fingerprinting.
It is a neuro psychological method of interrogation in which the accused’s participation in the crime is investigated by studying their brain’s response.
The BEOSP test is carried out via a process known as electroencephalogram, conducted to study the electrical behaviour of the human brain.
Under this test, the consent of the accused is first taken and they are then made to wear caps with dozens of electrodes attached to them.
The accused are then shown visuals or played audio clips related to the crime to check if there is any triggering of neurons in their brains which then generate brainwaves. The test results are then studied to determine the participation of the accused in a crime.